Textile pest proofing media



Patented Apr. 18, 19 33 UNITED. STATES PATENT OFFICE wmrarn nan'rmcn Ann max mnrmn, or wrnsnoar, riz'rna nacxns, or

COLOGNE-DEUTZ, AND

MANY, ASSIGNOR TO I. G. FABBENINDUSTRIE AKTIENGESELLSCEAFT, OF FRANK- IOBT-ON-THE-MAIN, GERMANY,

A. CORPORATION OF GERMANY 'mx'rrm PEST rnoormo mama Ho Drawing. Application med July 16, 1930, Serial No. 468,442, and in Germany August 26,1929.

The present invention relates to new media for protecting the like fromattack by moths or damage by other textile pests.

In accordance with the invention materials liable to attack by moths or other animal textile pests, such as hair, feathers, furs, wool and the like can be protected from-the attack by such pests by-incorporating therewith an inorganic selenium compound such as selenious acid, selenic acid and salts.

thereof. I

The compounds coming into consideration for the purpose of our invention are genererally in the form of their salts colorless crystalline compounds soluble in water and may be prepared, for example, according to the statements of Berichte der. deutschen chemischen Gesellschaft, vol. 55, page 2082; Zeitschrift fur anorganische Chemie, 116, page 193 and vol. 140-, of example the following mentioned: selenious acid, selenic acid, sodium selenate, ammonium selenite, selenious acid ethylene diamine and the like.

The protecting agents can be applied in various ways and even small proportions, for instance, 0.1-2 per cent app ied to the materials to be protected ma have the desired effect. Thus, for examp e, the compounds soluble in organic solvents can be dissolved in appropriate solvents, such as alcohols,

page 47. By way acetone, cyclohexanone and the like and 7 when dyed sprayed on to or the materials may tions of the active substances, or the mate- Conversely, the water soluble compounds (in the free form or as Water soluble salts) can be caused to act on the materials to be treated in an a ueous solution, in which connection the addition of organic or inorganic salts or acids or also of wetting agents ma be advantageous. Obviously the materials can also be simultaneously dyed and impregnated and with sulfuric acid it is possible to replace the sulfuric acid by selenic acid H SeO According'to the nature of the materials to be treated other methods of impregnation can also be employed and will wool, furs, feathers, hair and vol.

compounds may be the materials to be protected, be steeped into the solureadily suggestthemselves. The protective a cut is tenaciously retained by the objects t us treated, which thereby are protected from attack by textile pests.

The following examples serve to illustrate our invention without limiting it thereto: v

Example 1.10O k s. of wool are treated for half an hour in t 1e manner of a dyeing process with 1 kg. of selenic acid in the usual way with or without addition of a dyestufi'. Then the material is rinsed, hydroextracted and dried. The wool is now protected against attack by moths, anthrenus, attagenus and other textile pests.

E wample 2.The materials to be protected are treated for some time with a cold solution containing 1-2 grams per liter of selenious acid, then rinsed with water and dried. The materials show the same effect as described in Example 1.

E wample -3.-The wool to be protected is treated for some time with a cold aqueous solution containing 1-1.5 grams'per liter of ammonium selenate. The material is then ummhm s'ror'rna, or LEVEBKUSEN-ON-TKE-BHINE, oEacentrifuged and dried. The wool is thus rendered moth proof.

E mample 4.The material to be rotected is treated for some time with a col aqueous protected from attack by moths and the like.

Instead of the selenious acid other selenium comppunds, soluble in organic solvents, can also e used in a similar manner, for example, salts of selenious acidwith organic bases, for instance, with ethylenediamine, n-butylamine, cyclohexylamine and the lik All these compounds, even in small pro ortions, confer uponthe materials treated t erewith an excellentprotection against attack by textile pests.

Example 71-100 kilograms of wool are treated in the manner of a dyeing process with 0.5 per cent of ammonium selenate and 4 per cent of sulfuric acid. B this treatment the wool shows the former 57 described 1 efiect.

Example 8.100 awe of wool are heated in the manner of a going process while boil in with 6 per cent of no hthyl amine black ((ilour Index, 19% num er 24-6) 9 10 per cent of Glaubers salt (Ne SOJ and 1- per cent of selenic acid. The material thus treated is permanently protected against attack by moths, anthrenus, attagenus and other textile pests. We claim:

1. A textile pest proofing medium containing e water soluble salt of selenic acid.

2. A moth proofing medium containing the sodium selenate ofthe formula: SeO Na 3. A textile pest-proofing a ent containing a water-soluble compound of t e formula x wherein n is 3 or 4, and X stands for hydrogen, alkali metal, or ammonium which may be substituted by an organic radical.

In testimony whereof, we aflix our signatures.

WINFRID HENTRIOH. MAX HARDTMANN. PETER BACKES. HERMANN STOTTEB. 

